Home / 870,261.87-1,200,982.05-488,316.90

Finding the Fourth Proportional to 870,261.87, 1,200,982.05 and 488,316.90

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Solution

The fourth proportional to 870,261.87, 1,200,982.05 and 488,316.90 is: 673,888.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,261.87 : 1,200,982.05 = 488,316.90 : x
  2. Step 2: Convert to fraction form
    870,261.87/1,200,982.05 = 488,316.90/x
  3. Step 3: Cross multiply
    870,261.87x = 1,200,982.05 × 488,316.90
  4. Step 4: Simplify right side
    870,261.87x = 586,459,831,611.65
  5. Step 5: Solve for x
    x = 586,459,831,611.65/870,261.87
  6. Step 6: Final answer
    x = 673,888.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.